The disc diffusion assay measuring a disinfectant's effectiveness against a microorganism is more standardized than measuring an antibiotic's effectiveness with the kirby-Bauer assay. a) True b) False

The following questions refer to the analysis of cells using flow  cytometry  A) When analyzing cells in a flow cytometer how do you ensure you are analyzing single  cells rather than doublets or clusters of cells and why is that important?  B) How do forward versus side scatter plots enable the characterization of different  types of blood cells in the blood of a patient? How does this relate to a potential  diagnosis of acute leukemia?  C) How do you determine if a patient has B cell versus T cell Leukemia? Why is it  important to know?

What happens if you dont' add maltose in the molten top agar when performing an plaque assay? What would be the expected results?

The following table includes information from a procedure where mice were injected with different concentration amounts of a certain microbe (Mircobe A) under these distinct circumstances: no other treatment added (NT), after being exposed to anti-microbe A vaccine (vacA), and during treatment with a broad-spectrum antibiotic (x). CFU/ml Injected % Infected - NT % Infected - vacA % Infected - x 1 2 0 1 10 20 0 22 100 52 3 44 1000 100 14 97 1. What is the ID50 value of Microbe A (in CFU/ml)? 2. Is Microbe A antibiotic-sensitive? 3. Is the vacA vaccine effective to stop the infection?